NEW YORK — The U.S. government has seized more than $14 billion in bitcoin and charged the founder of a Cambodian conglomerate in a massive cryptocurrency scam, accusing him and unnamed co-conspirators of exploiting forced labor to dupe would-be investors and using the proceeds to purchase yachts, jets and a Picasso painting.

In an indictment unsealed Tuesday, Brooklyn federal prosecutors charged Prince Holding Group chairman Chen Zhi with wire fraud conspiracy and money laundering conspiracy. At the same time, U.S. and British authorities imposed sanctions on Chen's company, which is involved in real estate development and financial services, and the Treasury Department declared it a transnational criminal organization.

Chen, 38, is accused of sanctioning violence against workers, autho

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